burnham



No. 624,452. I Patented May 9, I899.

' F. A. BUBNHAM.

PLATEN PRINTING PRESS.

(Application filed Max. 19, 189B.)

2 Sheets-Shut I.

(No Model.)

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nonms PETERS 0o. PHOTO-LITHQ, wAsumcrm n c No. 624,452. Patented May 9, I899. F. A. BUBNHAM.

PLATEN PRINTING PRESS.

(Application filed Max. 19, 1598.) (No Model.) 2 Sheets$haet 2.

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ATTEET I Tux ENTE N. Z. :ErY ATTY m: nonms PETERS co. waroumo" WASHINGTON, u. c,

UNITED STATES PATENT OFFICE.

FRANK A. BURNHAM, CLEVELAND, OHIO, ASSIGNOR TO THE CHANDLER &

PRICE COMPANY,

OF SAME PLACE.

PLATEN PRINTING PRESS.

SPECIFICATION forming part of Letters Patent No. 624,452, dated May 9, 1899.

Application filed Marh 19, 1898.

, To all whom it may concern.-

Be it known that I, FRANK A. BURNHAM, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Platen Printing-Presses; and I do declare that thefollowing is a full, clear, and exact description of the invention, which will enable others skilled in the art to [O which it appertains to make and use the same.

My invention has reference to improvements in platen printing-presses; and theinvention consists in mechanism for engaging and rotating the ink-distributin g disk,all su bstantially as shown and d'escribed, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a side View of a press in which my invention is partially disclosed in elevation beneath the ink-disk. Fig. 2 is a plan View of the ink-disk with a portion broken away to disclose the engaging mechanism beneath the same. Fig. 3 is a cross-section of Fig. 2 substantially on line 3 3 on said figure. Fig. 4 is a plan view of the mechanism shown therein with a part of the bell-crank broken away and a part of the disk in section and showing the link which connects said crank and the said flange, with the ball-socket'caps removed and with holes adjacent to the sockets for the cap-fastening screws. I

A represents the main frame, and B the bed and its supporting members, pivoted below on the frame A.

C is the usual large gear at the side and top of the press, driven by the relatively small pinion D on shaft d, through which the power is applied to the press. The rod E connects gear-wheel C with the back shaft G, on which the ink-roller frame is supported and adapted to rock.

Now it is desirable that the inking-disk H should be intermittently but regularly rotated part way around as the ink-rolls pass over it, so as to obtain a uniform distribution of ink on and by the ink-rolls h, and it is further desirable that this rotation of the inkingdisk be effected with the least possible-strain to the machine and with mechanism that will be noiseless and out of the way. To these sev- Serial No. 674,450. (No model.)

eral ends I support on the bearing-sleeve for the hub of disk H, Figs. 2 and 3, whatis in this. instance shown as a substantially flat arm L, which extends out practically as faras the said disk on one side of the machine, Fig. 4, and is 5 freely supported on the hub h of the disk, so

as to rotate thereon and come back to starting position after each partial rotation of the disk without carrying back the disk itself. To make the necessary engagement with the said disk to effect partialand intermittent rotation thereof, the disk itself is provided on its under side and some distance from its edge with a circular flange h of such depth as to afford a bearing-surface for theengag- 6 ing mechanism. On the arm L, just outside of this flange and practically in constant touch therewith, is a segmental rib-l and so constructed and positioned that pressure against the inside of flange h by mechanism support- 'ed on said arm will lock the said flange and rib together, and thereby rotate the ink-disk. The engaging mechanism whereby thisis accomplished consists of what may be termed a cam-lever m, pivot-ed on the arm L and so constructed and arranged that when in one position its engaging portion contacts forcibly with the flange h and locks itself thereon,

as seen in Fig. 4, and when in the reverse position is disengaged and free from said flange, as seen in Fig. 2. The said lever m makes such engagement with flange h as to itself participate both in the locking engagement, which is completed on the other side by rib Z, and in the forward movement of the ink- 8 disk.

Now in order to actuate the locking-lever m, as well as to release the same, I employ a bell-crank device N, having two arms at and n and supported at their angle on a short rock-shaft m The arms a and n are separated on this common axis n -say as seen in Fig. 3.and are actuated through arm n, having a roller 17,, running on the curved track or cam P, which is fixed on the rocking ink- 5 roller frame F. The construction and location of this track for roller 01 on arm n are such that when the ink-rollers are carried up over the inking disk or plate H the arm 'n will ride upon the higher surface of track P, I00

which is practically concentric with shaft G, and cause the arm n to keep cam-lever m in fixed position, and thus prevent the inkingback to position seen in Fig. 1 and cam-lever m is actuated and the disk 11 is rotated. On the-reverse oscillation of frame F the foregoing operations of disk H are again repeated, and so on continuously.

It will be noticed that by this construction of disk locking and actuating mechanism several advantages are obtained that are very material in the operation of the machine. In the first place the mechanism to do this work is removed from outside exposure and is simple and practically noiseless. These all are material considerations, as every practical printer knows. In the next place a thoroughly-effective locking engagement is made with the ink-disk I-I without bringing any strain or binding effect whatever on the bearing of said disk or on the arm L, by which it is actuated. In other words, the binding and the locking are both at the same place, between the rim or flange h, the rib Z, and the cam-lever m, where they are needed and belong. This leaves both disk II and arm L perfectly free to be rotated and afiords what I regard as an ideal mechanism and arrangement for this purpose.

Connection is made between the crank-lever arm n and the cam m by means of a single link 0, having heads at its ends with semispherical sockets or cavities and carrying re- -movable caps with corresponding cavities to engage the balls 0 and 0 on arm n and cam m, respectively. A screw-hole 0 Fig. 4, is provided at'each end of link 0 for, the screws to fasten said caps. The link 0 engages the cam-arm m at its long end, so as to obtain a strong leverage, and a pin or lug-m serves'as a back-stop to the arm m. This furnishes a very simple, quiet, and positive actuation to the cam-arm m and makes it respond directly to every movement of the crank-levers n and n. Especially does it afford a positive and prompt engagement of the inking-disk when such engagement occurs and also a prompt release. However, in order that the return movement of lever L may be assisted and that a dragging release and engagement of the lock may be prevented I employ a coil-spring R, supported at one end on the press-frame and engaged at the other with a lug on the hub of lever L. This helps to hold lever L back till positiveengagement occurs by arm m and helps it back to normal position when released. The crank-levern has an enlarged head which carries roller'n, and this head serves as a counterweight to arm n and the mechanism connected therewith to likewise promote prompt action of the cam m. When the reverse action occurs through bell-crank N after the cam-lever m has been engaged and operated in one direction, the said lever in its opposite movement strikes the pin or lug m on arm L and causes saidarm to move or travel a limited distance with it, cooperating with coil-spring R.

\Vhat I claim as new, and desire to secure by Letters Patent, is

1. Theinking-diskhavingaflange on its bottom, an arm pivoted on the hub of the disk having an upward projection to bear against the outside of said flange, in combination with a locking-cam pivoted on said arm to engage the inside of said flange and rotate the disk, and a projection on said arm engaged by said cam in its reverse movement, a bell-crank and link .to actuate said cam, and the inkroller frame to actuate said bell-crank, substantially as described.

'2. The mechanism for actuating theinkingdisk, comprising a bell-crank and the oscillating frame and a cam thereon to operate the bell-crank, in combination with the inkingdisk having a circular flange on its bottom, a rotatable arm beneath said disk, a cam-lever pivoted on said arm and constructed to engage and lock on said circular flange and a link having pivotal connections with said lever and one part of the aforesaid bell-crank lever, substantially as described.

Witness my hand to the foregoing specification this fth day of March, 1898.

FRANK A. BURNIIAM.

WVitnesses:

H. T. FISHER, R. B. MosER. 

